数字农科院2.0

The coat protein of the ilarvirus prunus necrotic ringspot virus mediates long-distance movement

文献类型： 外文期刊

作者： Chengyong He;Fei Xing;Xiaoli Zhao;Shifang Li;Binhui Zhan;Zhen Liu;Tengfei Xu;Dehang Gao;Zhenfei Dong;Hongqing Wang;Zhixiang Zhang

作者机构：

关键词： ApNMV;cucumber;long-distance movement;PNRSV;reassortment;viral pathogenesis

期刊名称： The Journal of general virology

ISSN： 1465-2099

年卷期： 2023 年 104 卷 2 期

页码：

收录情况： SCIE（2023版）

摘要： The coat protein (CP) of plant viruses generally has multiple functions involving infection, replication, movement and pathogenicity. Functions of the CP of prunus necrotic ringspot virus (PNRSV), the causal agent of several threatening diseases of Prunus fruit trees, are poorly studied. Previously, we identified a novel virus in apple, apple necrotic mosaic virus (ApNMV), which is phylogenetically related to PNRSV and probably associated with apple mosaic disease in China. Full-length cDNA clones of PNRSV and ApNMV were constructed, and both are infectious in cucumber (Cucumis sativus L.), an experimental host. PNRSV exhibited higher systemic infection efficiency with more severe symptoms than ApNMV. Reassortment analysis of genomic RNA segments 1-3 found that RNA3 of PNRSV could enhance the long-distance movement of an ApNMV chimaera in cucumber, indicating the association of RNA3 of PNRSV with viral long-distance movement. Deletion mutagenesis of the PNRSV CP showed that the basic motif from amino acids 38 to 47 was crucial for the CP to maintain the systemic movement of PNRSV. Moreover, we found that arginine residues 41, 43 and 47 codetermine viral long-distance movement. The findings demonstrate that the CP of PNRSV is required for long-distance movement in cucumber, which expands the functions of ilarvirus CPs in systemic infection. For the first time, we identified involvement of Ilarvirus CP protein during long-distance movement.

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